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2 years ago

How do Archaeologists use fossils?

2 answers:

mihalych1998 [28]2 years ago

5 0

An archaeologist has to know the difference between artifacts and fossils. (it’s important because archaeologists don’t look for fossils) fossils are the remains of living things (people, plants, animals)

STatiana [176]2 years ago

3 0

To learn about the beings of history

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How do you intrusive rocks form

Elodia [21]

Answer: Intrusive rock also called plutonic rock. They are formed from magma forced into older rocks at depths within the earths crust.

Explanation:

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2 years ago

What would the empirical formula be for the molecular compound CoH904?

Mashutka [201]

It would be the same thing if the Co does not have a number with it because it can’t reduce

5 0

2 years ago

Calculate the hight of a column of liquid glycerol in meters required to exert the same pressure as 3.02 m if CCl4?

katovenus [111]

Answer:

Approximately $3.81\; \rm m$ .

Explanation:

Look up the density $\rho$ of carbon tetrachloride, $\rm CCl_4$ , and glycerol:

Density of carbon tetrachloride: approximately $1.59\times 10^{3}\; \rm kg \cdot m^{-3}$ .
Density of glycerol: approximately $1.26\times 10^{3}\; \rm kg \cdot m^{-3}$ .

Let $g$ denote the gravitational field strength. (Typically $g \approx 9.81\; \rm N \cdot kg^{-1}$ near the surface of the earth.) For a column of liquid with a height of $h$ , if the density of the liquid is $\rho$ , the pressure at the bottom of the column would be:

$P = \rho\cdot g \cdot h$ .

The pressure at the bottom of this carbon tetrachloride column would be:

$\begin{aligned} P &= \rho \cdot g \cdot h \\ & \approx 1.59\times 10^{3} \; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1} \times 3.02 \; \rm m \approx 4.71 \times 10^{4} \; \rm N \cdot m^{-2} \end{aligned}$ .

Rearrange the equation $P = \rho\cdot g \cdot h$ for $h$ :

$\displaystyle h = \frac{P}{\rho \cdot g}$ .

Apply this equation to calculate the height of the liquid glycerol column:

$\begin{aligned}h &= \frac{P}{\rho \cdot g} \\ &\approx \frac{4.71 \times 10^{4}\; \rm N \cdot m^{-2}}{1.26 \times 10^{3}\; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1}} \approx 3.81\; \rm m\end{aligned}$ .

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2 years ago

if a television with mass 15kg is lifted to a shelf of height 1.2m, how much gravitational potential energy is added to the tele

belka [17]

P =mgh

You have mass, g =9.8 m/s2 and height calculate the potential energy P

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2 years ago

!!help ASAP 15 points!!Why do atoms form bonds?

hjlf

The answer is C to achieve an octet of valence electrons so they become stable

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3 years ago